Compaq 12/24 DAT SCSI and Windows ME

I can not get my Compaq 12/24 DAT tapedrive to work with Windows Me.Under System the tapedrive is found and installed but when I start the Windows Me backup software it tells me that there is no tapedrive available.I tried to remove the tapedrive and when I restart again the Plug&Play find the new device again but still the Backup does not work.